[1] Yale Sch Med, Dept Lab Med, New Haven, CT USA
[2] Univ Texas Southwestern, Dept Pathol, Div Transfus Med & Hemostasis, Dallas, TX USA
[3] Univ Connecticut Hlth, Dept Dermatol, Farmington, CT USA
[4] Vanderbilt Univ, Dept Pathol Microbiol & Immunol, Med Ctr, Nashville, TN USA
[5] Yale Sch Med, Dept Lab Med, 55 Pk St, New Haven, CT 06511 USA